Question

Determine whether y varies directly with x. If so, find the constant of variation k and write the equation.
x y
4 6.4
7 11.2
10 16
13 20.8

Answer 1

k = y/ x

Answer 2

so what should i do

Answer 3

it varies directly. to get the constant divide a y value by its corresponding x value

Answer 4

6.4/4=1.6=k

Answer 5

yes. that's right

Answer 6

so i do that to all of them and that all

Answer 7

yes. They will all give you the same answer. That shows its directly proportional

Answer 8

thanks